The answer you are looking for is 9=(+++)
hey mate:-
- hey mate:- A{12,20,21,22,23}
- here number of elements in A= 5
B{18,19,20,21,22}
here number of elements in B= 5
- number of elements in A= number of elements in B= 5
as we know
when number of elements are same
given
- here number of elements in A=here number of elements in B
there fore these are equivalent sets..,,
Nearest hundred is 300 anything 50 and above rounds up and below 50 it rounds down
Answer: Because 
, therefore 
.
